Alert archive / Texas / Red Flag Warnings in 2018
Red Flag Warning 7, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this red flag warning at Dec 20, 2018, 3:15 PM CST for 19 counties in Texas. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Dec 20, 2018, 3:15 PM CST (21:15 UTC)
- Expired
- Dec 20, 2018, 6:00 PM CST
- In force
- 3 hr
- Issued by
- NWS Austin/San Antonio, TX
Counties Atascosa County, TX, Bandera County, TX, Bexar County, TX, Comal County, TX, Dimmit County, TX, Edwards County, TX, Frio County, TX, Guadalupe County, TX, Karnes County, TX, Kendall County, TX, Kerr County, TX, Kinney County, TX, Maverick County, TX, Medina County, TX, Real County, TX, Uvalde County, TX, Val Verde County, TX, Wilson County, TX, Zavala County, TX
The radar
The Laughlin AFB radar (KDFX), 99 km from the middle of the area, began a volume at 21:14 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
Del Rio, TX (KDLF), launched 12:00Z, 9.3 hours before the alert went out and 153 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1702 m above ground
- 0-6 km bulk shear
- 82 kt
- 0-1 km storm-relative helicity
- -129 m²/s²
- 0-3 km storm-relative helicity
- 168 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
136 WWUS84 KEWX 202115 RFWEWX URGENT - FIRE WEATHER MESSAGE National Weather Service Austin/San Antonio TX 315 PM CST Thu Dec 20 2018 TXZ183>187-189-202>207-217>222-228-210000- /O.NEW.KEWX.FW.W.0007.181220T2115Z-181221T0000Z/ Val Verde-Edwards-Real-Kerr-Bandera-Kendall-Kinney-Uvalde-Medina- Bexar-Comal-Guadalupe-Maverick-Zavala-Frio-Atascosa-Wilson-Karnes- Dimmit- 315 PM CST Thu Dec 20 2018 ...RED FLAG WARNING IN EFFECT UNTIL 6 PM CST THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR PORTIONS OF THE HILL COUNTRY... RIO GRANDE...WINTER GARDEN...BRUSH COUNTRY...AND I-35 CORRIDOR... The National Weather Service in Austin/San Antonio has issued a Red Flag Warning for wind and low relative humidity, which is in effect until 6 PM CST this evening. * WINDS...Northwest 15 to 25 mph with gusts up to 35 mph. * RELATIVE HUMIDITY...15 TO 25 percent. * IMPACTS...Any fires that develop will likely spread rapidly. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$
1 follow-up statement
019 WWUS84 KEWX 202358 RFWEWX URGENT - FIRE WEATHER MESSAGE National Weather Service Austin/San Antonio TX 558 PM CST Thu Dec 20 2018 TXZ183>187-189-202>207-217>222-228-210100- /O.EXP.KEWX.FW.W.0007.000000T0000Z-181221T0000Z/ Val Verde-Edwards-Real-Kerr-Bandera-Kendall-Kinney-Uvalde-Medina- Bexar-Comal-Guadalupe-Maverick-Zavala-Frio-Atascosa-Wilson-Karnes- Dimmit- 558 PM CST Thu Dec 20 2018 ...RED FLAG WARNING WILL EXPIRE AT 6 PM CST THIS EVENING FOR PORTIONS OF THE HILL COUNTRY...RIO GRANDE...WINTER GARDEN...BRUSH COUNTRY...AND I-35 CORRIDOR... Wind speeds and gusts will continue to diminish through the evening hours to less than 15 mph and less than 10 mph overnight. Relative humidity values will recover to around 65 to 75 percent overnight. $$
The office that day
Everything else NWS Austin/San Antonio, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 20, 3:38 AM CST | Wind Advisory | EWX | Atascosa, Bandera, Bastrop, Bexar, Blanco, Burnet and 19 more | 14 hr |
Nearby
Red Flag Warnings in Texas, 2018Every red flag warning in 2018
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.